Revert 244982 "Revert 244857 "net: Remove classes which were use..."

> Revert 244857 "net: Remove classes which were used only by Chrom..."
>
> > net: Remove classes which were used only by Chrome Frame
> >
> > UploadData and UploadFileElementReaderSync were used only by Chrome Frame
> >
> > BUG=None
> > TEST=build
> > R=mmenke@chromium.org
> > TBR=jam@chromium.org for content/child/resource_dispatcher_unittests.cc
> >
> > Review URL: https://codereview.chromium.org/131903004
>
> TBR=hashimoto@chromium.org
>
> Review URL: https://codereview.chromium.org/139263007

TBR=oshima@chromium.org

Review URL: https://codereview.chromium.org/140733002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245476 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245476